A team of astronomers led by Richard Gott III and Mario Juric (both USA) of Princeton University, Princeton, New Jersey, USA, have discovered a huge wall of galaxies some 1.37 billion light years long. They used data from the Sloan Digital Sky Survey, which is mapping the locations of one million galaxies in the universe. Their discovery was announced in October 2003.

Dubbed the ‘Sloan Great Wall’, this structure consists of an unusually dense concentration of galaxies within the filamentary large-scale structure of the universe.